Network synchronization over IP networks
First Claim
1. a method for clock synchronization in an IP connected network including a plurality of members comprising:
- creating, by a domain management module and CPU, a master domain with a master domain source;
adding members to the master domain source until fan-out has been reached;
detecting a failure of the master domain source;
dynamically promoting a member to a tandem source;
after the promotion of the member to the tandem source, adding additional members to the tandem source until fan-out has been reached; and
clocking the added additional members from the tandem source.
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Accused Products
Abstract
Network timing is derived from the PSTN and distributed through the network to gateways capable of deriving timing from the incoming UDP stream. The derived timing has the correct frequency for voice telephony without using external timing sources or extraneous hardware components. For example, a digital signal processor (DSP) can derive the timing from a timed TDM bus and distribute messages, such as IP messages, to other gateways or port networks. The other gateways and port networks use the incoming stream to extract the timing which is then used to time their TDM bus. The port networks and gateways can also distribute other streams to other gateways in a fan-out type of arrangement. This internally generated timing can be used, for example, for Circuit Emulated Services (CES).
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Citations
20 Claims
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1. a method for clock synchronization in an IP connected network including a plurality of members comprising:
- creating, by a domain management module and CPU, a master domain with a master domain source;
adding members to the master domain source until fan-out has been reached;
detecting a failure of the master domain source;
dynamically promoting a member to a tandem source;
after the promotion of the member to the tandem source, adding additional members to the tandem source until fan-out has been reached; and
clocking the added additional members from the tandem source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- creating, by a domain management module and CPU, a master domain with a master domain source;
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14. a clock synchronized IP connected network including a plurality of members comprising:
- a domain management module and CPU that;
creates a master domain with a master domain source and adds members to the master domain source until fan-out has been reached;
dynamically promotes a member to a tandem source; and
after the promotion of the member to the tandem source, adds additional members to the tandem source until fan-out has been reached, wherein subsequently added additional members are clocked from the tandem source. - View Dependent Claims (15, 16, 17, 18, 19, 20)
- a domain management module and CPU that;
Specification